Noel Alston, 24, was arrested at his Fitch Street home Tuesday and charged with being a fugitive from justice. He was held on $500,000 bond as police prepared to extradite him to Massachusetts, police said.

According to the Cambridge Police Department, Alston had been harassing a woman through phone calls and emails for more than a year. The woman told police that between November 2012 and February 2014 she received numerous calls, emails, Youtube videos and voicemails from Alston. The woman attended high school with Alston but never dated nor had a relationship with him, police said. She told Cambridge police that he was delusional and believed he was in a relationship with her.

The woman told Alston to stop contacting her and blocked his emails, but he was still able to get her phone number by unknown means, police said. She told him that she would get a restraining order against him, and said he became increasingly aggressive, according to police reports. He told her that she was not afraid of a restraining order, and that she would regret it, police said.

Cambridge police advised the woman to get a restraining order, and issued a warrant for Alston's arrest. After determining that he lives in Norwalk, they contacted Norwalk police, who arrested him at his home Tuesday morning.